Grinding wheel dresser

ABSTRACT

A grinding wheel dresser having a contour block mounted on the grinding wheel spindle housing for reciprocating horizontal movement above and across the upper peripheral face of the grinding wheel to provide a wheel shape that is a mirror image of the contour block.

[151 3,662,732 [451 May 16, 1972 [54] GRINDING WHEEL DRESSER 125/11 ...l25/ll 125/11 11/1959 Sommer.

m Ha or. PC 7 5 99 11 WW 1 we 445 1191 2 2 an [72] Inventors: George Banko, Euclid; William J. Knu

Maple Heights, both of Ohio Brown 8i Sharpe Mfg. Co., Precision Par North Kingstown, RI.

k, Primary Examiner-Harold D. Whitehead Att0rney-Sanf0rd Schnurmacher [73] Assignee:

m. A R T S B A n 5 .l 0 7 9 0 6 W 3 A3 0 N .ml 0. who. FA T 22 A grinding wheel dresser having a contour block mounted on u 8 Cl the grinding wheel spindle housing for reciprocating horizon- B 555 R tal movement above and across the upper peripheral face of M Sc h 3 the grinding wheel to provide a wheel shape that is a mirror ie o are image oflhe contour block [51] lnt.Cl...............

1 Claims, 7 Drawing Figures [56] References Cited UNITED STATES PATENTS 2,730,851 1/1956 Wallace l/ll P'A'TENTED m 16 I972 SHEET 1 UF 4 ATTOENEK PATENTmm 16 ran 3. s62 732 $HEET 2 BF 4 IIIII:

. INVENTORS. 660E66- EAN/ 0 BY WILL/AM KNUFF 24 WZ M ATTORNEY.

PATENTEDMM 16 m2 3, 662 732 SHEET 3 BF 4 Fig. 3

. INVENTORS. GEORGE 5A NKO BY WILL/4M J. KNUFF My; QZZMM A/ GRINDING WHEEL DRESSER The primary object of the invention is toprovide a grinding wheel dresser that is permanently mounted on the spindle housing of a grinding machine, to provide a convenient method of shaping a contour in a grinding wheel, mounted on the same spindle, by means of a horizontaly reciprocating diamond coated contour block.

Another object is to provide a device of the type stated whose wheel contouring block maintains its 'physicalalignment with the grinding wheel even when.the grinding wheel is operating on a work-piece.

A further object is to provide a wheel dresser whose shaping element reciprocates in ahorizontal plane,.always above'the grinding wheel, .50 that the wheel can be re-shaped without removing the work-piece which is being operated upon from the machine.

. Still another object'is toprovide results heretofore'not obtainable and in a new and beneficial manner.

Other objects, and a fuller understanding of our invention may be had by referring to the following description and claims, taken in connection with-the accompanying drawing, in which:

FIG. 1 is'a front elevational view of a device embodying our invention;

FIG. 2 is a left end view ofthe same, partlyin section,.taken along the line and in the direction of-the arrows 2.-2 of FIG.

FIG. 3 is a front view, partly in section, taken alongthe line and in the direction of-the arrows'3-3 of FIG.-2;

FIG. 4 is a sectional view taken along the line and in the direction of the arrows 4-4 of FIG. 1;

FIG. 5 is a sectional view, with portions broken away, taken along the line and in the direction of the arrows 5-5 of 'FIG. 1; I

FIG. 6 is a horizontal sectional view taken along the line and in the direction of the arrows 6-6 of FIG. 1, and,

FIG. 7 is a vertical sectional view taken along the line andin the direction of the arrows 7-7 of FIG. 1.

Referring more particularly to the drawing, there is seen in FIG. 1 the Grinding Wheel Dresser, that is the subject of this invention, broadly indicated by reference numeral 10.

The unit l0 is mounted on thegrinding wheel spindle housing 11 of a conventional surface, or cylindrical, grinding machine, not otherwise illustrated, through a clamp-type collar 15 which is locked inplace by means of bolts 51, as seen in FIGS. 1 and 2. The spindle housing 11 has a flat ground in the upper surface thereof, against which is fitted a flatbar16, mounted'crosswise of the collar 15, which prevents tilting of the unit 10, if the bolts 51 should become loosened, and also serves to position the frame 14 in a verticalposition, normal to the axis of rotation of the grinding wheel 12. g

Reference numeral 17 indicates a vertical dove-tail located on the forward face of the frame 14, as is seenmost clearly in FIG. 6. A slide 24 is mounted on the dove-tail 17. The slide is movable vertically of the frame 14 between adjusted positions by means of a threaded shaft and hand wheel :18, as seen'in FIGS. 1 and 2, and is locked in said adjusted positions by means of lock rodsl9 whichare pressed against the gib-of the slide 24 by means of a threaded lock wheel as seen again in FIGS. 1 and 6.

Reference numeral 26 and 27 indicate two spaced and laterally extending horizontalposts mounted on the slide 24, as seen in FIG. 6. Each post 26 and 27 has a'toothed rack 28 and 29, respectively, at the free end thereof.

A horizontally extending table :member 53 is slidably mounted on the posts 26 and 27 for lateral travel relative to the face of the slide 24, as seen in FIGS. 6 and 7. V

The table 53 is movable between adjusted positions by means of the hand wheel 34 which actuates a toothed shaft 31 which engages the toothed racks 28 and 29 of posts 26 and 27, through a worm and worm-gear 33 and 32, respectively, as seen in FIGS. 5 and 6.

The table 53'is locked in adjusted positions by means of a threaded hand wheel 36 which can be rotated to exert prestioned atthe rail ends, Thepaired rails are shaped along their inner faces to provide a T-shaped travel track, or slot 37.

v Reference numeral 38 indicates a T-shaped shuttle fitted in track 37 and'free to move lengthwise "thereof in both 7 directions.

"Movement of the shuttle 38 is effected by a.-chain '43 anchored at opposite ends of 'the'shuttle bymeans of mounts 52, and traveling over a drive sprocket and idler sprockets 46-46. The chain driving sprocket 49 is rotated through a crank handle 45.

' Rotation of the crankhandlein either direction effects corresponding'movement oftheshuttle 35 lengthwise ofthe track 37.

Reference numeral'49;indicates an elongated, flexible,dust guard attached to opposite ends of the shuttle, which'travels in a continuous slot 28, with theshuttle 38, serving to prevent dust, dirt and chips from entering the track cavity 37.

An-adapter47 is bolted-to the lower surface of the shuttle '38, and extends below the guard 49. The adapter 47 hasa cavity 39 along its lower surface, adapted to receive a grinding wheel dressing tool 40 therein, which is maintained in-place by a plurality of anchoring bolts 41, as is seen most clearly in FIGS. 3 and 7.

In the form'illustrated the tool 40 is a diamond coated contour block. The'diamonds being plated orhand setin a matrix,

as is well known to those skilledin the-art.

The formed contour42 is a mirrorimage of the shape to be imparted to'the cutting face of the grinding wheel 12.

As shown in'FIG. 2;thegrinding wheel edge 13 is shaped to grind gear teeth on a cylindricalwork-piece, not illustrated.

It is to be understood that instead-of using a diamond coated contour block, other suitable materials can be used such as tungsten carbide 'for shaping copper wheels, or tool steel for 45' brasswheels. I

A grinding wheel protective shield covers the upper half I of the grinding wheel 12 and the travel path of the tool 40, as

seenin FIGS. -1, 2 and 3.

-It will be evident that the table53 is always in a horizontal plane spaced'upwardly of the grinding wheel 12 To bring the contour block 40 into its operationalwheel dressing position-the block 40 is positioned onits travel-track 37 above the projected axis of rotation of the grinding wheel spindle, by rotating the crank handle 45.

The table 53 is then moved laterally of the slide '24, on its support posts 26 and 27, by rotation of the hand wheel '34, after loosening the lock wheel 36, until the wheeldressing surface 42 of the contour block 40 is in alignment with the peripheral edge of the grinding wheel 12 at the point where the convex surface 13 is tobe developed. The lock wheel 36 is then re-tightened to lock and hold the table 53'at this position.

The lock wheel 20 of the slide 24 is loosened and, by rotating the hand wheel 18, the slide 24 and its supported table '53 is lowered until the contour block '40 is brought into proper travel alignment with the upper edge of the grinding wheel l2. The wheel 20 is then re-locked.

The grinding wheel 12 is then made to rotate, and the-contour block 40 is caused to travel back and forth across .the upper edge of the revolving wheel 12in a horizontal path the length of the table travel-track 37, by rotation of the hand wheel 45 in alternate clockwise and counter-clockwise directions.

As the shapingproceeds the table 53 is lowered by small increments, by appropriate manipulation of theslide hand wheel 18 and lock wheel 20 When the dressing operation is complete the contour block 40 merely has to be positioned at one end of the travel-track 37, clear of the wheel 12, as seen in FIG. 1, where it remains until needed again The so dressed grinding wheel 12 is immediately ready to operate on the work-piece, which need not be disturbed during the dressing operation just described.

It will be noted that the contour block remains in alignment with the grinding wheel edge 13, while it is out of use between dressing operations, so that no time is lost in dismantling the dresser structure when it is not in use, or repositioning and realigning the contour block 40, when the grinding wheel 12 has to be re-dressed.

It will now be clear that there is provided a device which accomplishes the objectives heretofore set forth.

While the invention has been disclosed in its preferred form, it is to be understood that the specific embodiment thereof, as described and illustrated herein, is not to be considered in a limited sense, as there may be other forms or modifications of the invention which should also be construed to come within the scope of the appended claims.

We claim:

1. In combination with a surface, or cylindrical, grinding machine having a grinding wheel spindle journaled in a housing and a grinding wheel mounted at the free end of the spindie, a grinding wheel dresser, comprising:

a. an upright frame member permanently mounted on the spindle housing;

b. a slide member mounted on the frame for vertical movement relative to the spindle and supported grinding wheel;

c. a horizontally extending table member mounted on the slide, including means for moving the table laterally in a horizontal plane toward and away from the slide, above the upper peripheral edge of the grinding wheel;

d. a pair of spaced and parallel rail members mounted on the under surface of the table, defining a track extending the length of the table;

e. a shuttle member slidably mounted on the track for reciprocating movement the length thereof;

reciprocating means mounted on the table and engaged with the shuttle; and,

g. a contour block dependently mounted on the shuttle, said contour block having a cutting surface that is a mirror image of the configuration to be imparted to the grinding wheel. 

1. In combination with a surface, or cylindrical, grinding machine having a grinding wheel spindle journaled in a housing and a grinding wheel mounted at the free end of the spindle, a grinding wheel dresser, comprising: a. an upright frame member permanently mounted on the spindle housing; b. a slide member mounted on the frame for vertical movement relative to the spindle and supported grinding wheel; c. a horizontally extending table member mounted on the slide, including means for moving the table laterally in a horizontal plane toward and away from the slide, above the upper peripheral edge of the grinding wheel; d. a pair of spaced and parallel rail members mounted on the under surface of the table, defining a track extending the length of the table; e. a shuttle member slidably mounted on the track for reciprocating movement the length thereof; f. reciprocating means mounted on the table and engaged with the shuttle; and, g. a contour block dependently mounted on the shuttle, said contour block having a cutting surface that is a mirror image of the configuration to be imparted to the grinding wheel. 